Stuttering is one of the controversy diseases. thus, therapy for stuttering varies according to the therapists' belief. this study was conducted on four groups of stutterers; 30 stutterers each, with age range 15-35 years. Three groups received therapy sessions using the three different behavioral readjustment programs namely: coarticulation program of stromsta, smith accent method, and Van Riper's non-avoidance program. All patients attended individual therapy sessions, twice a week. the fourth group was a control one. All patients were assessed at the interview, after 8 weeks, and after 16 weeks

A multidimensional assessment protocol was used for assessment of all patients. It included elementary diagnostic procedures, clinical diagnostic aids, and additional instrumental diagnostic assessment.

The results obtained from this study showed that there were significant improvements of the stuttering severity for most of the measurable parameters for all therapeutic groups. Although there was significant difference between all therapeutic groups and control group, there was no significant difference between the results of all therapeutic groups.